Duration & Credit Pulse
Executive Summary
Bottom Line: The September 2026 CPI report showed headline inflation accelerating to 3.7% and producer prices rising 6.3% year over year, yet Treasuries rallied. The 10-year yield declined 17bp to 5.08% in a bull flattener as Fed officials' earlier signals of an October pause held and a selloff in AI-related equities drew flows into duration. Credit diverged by quality: high yield spreads widened 31bp to 331bp, matching their widest level of 2026, while investment grade widened 3bp.
Duration Dashboard: Treasury Yields After the September 2026 CPI
| Maturity | October 11, 2026 | October 18, 2026 | Weekly Δ | 5-Year Percentile |
|---|---|---|---|---|
| 2‑Year | 4.79% | 4.71% | -8 bp | 83rd %ile (elevated) |
| 5‑Year | 5.02% | 4.87% | -15 bp | 98th %ile (extreme) |
| 10‑Year | 5.24% | 5.08% | -17 bp | 99th %ile (extreme) |
| 30‑Year | 5.60% | 5.42% | -17 bp | 99th %ile (extreme) |
Values reflect Friday closes (October 9 and October 16). Weekly changes are calculated from unrounded closes. The bond market was closed Monday, October 12, for Columbus Day.
Bull Flattening After the September 2026 CPI
Curve Analysis: Yields declined across the curve, with the 10-year and 30-year each 17bp lower against an 8bp decline in the 2-year. The 2s10s spread narrowed to 37bp from 45bp and 2s30s to 71bp from 81bp, a bull flattener. The front end held up because the CPI data kept a December hike in view, while the long end absorbed risk-off demand.
The September 2026 CPI release on Wednesday initially pushed yields higher: the 10-year reached 5.33% intraday, near the 5.31% closing high set October 5, before reversing to close at 5.19%. The rally extended Thursday despite a stronger-than-expected PPI report, with the 10-year closing at 5.06%, and the week ended at 5.08%. The 2-year followed a different path, rising to 4.80% on CPI day before declining 6bp Thursday and 3bp Friday as October hike pricing faded. The 10-year now sits roughly 20bp below the 5.27% level discussed in our October 4 report on the September jobs data, although all three longer maturities remain at or above the 98th percentile of their five-year range.
Credit Pulse
| Metric | October 11, 2026 | October 18, 2026 | Weekly Δ | 5-Year Percentile |
|---|---|---|---|---|
| IG OAS | 78 bp | 81 bp | +3 bp | 36th %ile (middle range) |
| HY OAS | 300 bp | 331 bp | +31 bp | 43rd %ile (middle range) |
| VIX Index | 14.84 | 19.99 | +5.15 | 67th %ile (middle range) |
Credit underperformed rates as risk appetite weakened. High yield OAS widened 31bp to 331bp, matching the 2026 wide first set on March 30, while investment grade widened 3bp to 81bp. Both moves were front-loaded on CPI day: IG reached 88bp and HY 331bp on Wednesday before IG retraced most of its widening by Friday. The VIX rose 5.15 points to 19.99, its highest close since July 29. Even after the move, high yield spreads sit in the middle of their five-year distribution at the 43rd percentile, so the week reflected a repricing from tight levels rather than broad credit distress.
AI infrastructure credit: The widening concentrated in AI-linked and lower-rated issuers. On Wednesday, Gartner warned that a significant share of AI-infrastructure spending could face impairment by 2030, and CoreWeave shares fell more than 15% the same day. The cost of insuring CoreWeave's roughly $50 billion of debt against default rose above 1,000bp, a record, and its 2031 bonds briefly yielded above 16% on Thursday. Goldman Sachs strategists reported that AI-related high yield spreads widened 25bp between October 13 and 14 to a record 360bp, while non-AI high yield moved about 2bp. Oracle's five-year CDS also reached a record during the week.
Primary market and flows: Bank earnings reopened financial issuance. Goldman Sachs reported third-quarter EPS of $17.01 on strong equities trading, Citigroup beat estimates, and JPMorgan fell short of consensus. Bank of America priced an $8 billion four-part offering on Friday, with the longest tranche tightening about 25bp from initial price talk to a spread of 95bp. Fund flows remained supportive, with US bond funds recording a 26th consecutive week of inflows in LSEG Lipper data through October 14, while technology equity funds saw their largest outflow since June.
US Macroeconomic Assessment: September 2026 CPI, PPI and Activity Data
The week's data showed inflation broadening from energy into producer prices while real consumer demand slowed. Factory and production data were firm. Together these readings point to a stagflationary mix that leaves the Fed with less room to respond to weaker growth.
Headline inflation reaccelerated on energy: The September 2026 CPI rose 0.6% for the month and 3.7% year over year, up from 3.4% in August. The gasoline index rose 9.1% and the energy index 5.2% for the month, making energy the primary driver of the increase. Core CPI rose 0.3% and 2.6% year over year, each a tenth above the Dow Jones consensus. Core inflation remains well below the headline rate, which supports the argument that the Fed can wait on the next move.
Producer prices point to further pass-through: Thursday's PPI report was the week's larger surprise. Final demand prices rose 1.3% in September, more than double consensus, and 6.3% year over year, the largest annual gain since December 2022. Core PPI rose 0.7% for the month and 5.0% year over year. Pipeline pressures of this size raise the risk that energy costs reach core consumer prices in coming months.
Consumer demand slowed beneath strong nominal sales: Retail sales rose 0.8% in September, above the 0.3%-0.4% consensus, but gasoline stations accounted for much of the gain. The control group, which feeds into GDP, rose only 0.1% after a 1.2% gain in August. Price increases are absorbing a larger share of household spending.
Manufacturing and labor remained firm: The Empire State manufacturing index rose to 25.5 from 7.6, well above the 10.3 consensus and the highest since December 2021, with prices paid elevated. The Philadelphia Fed index eased to 20.9 from 37.8 but stayed in expansion. Industrial production rose 0.7% in September and capacity utilization increased to 76.9%. Initial jobless claims were 199,000 for the week ended October 10, the fifth consecutive week below 200,000, and continuing claims held near 1.71 million.
Energy remains the main macro risk: WTI crude settled above $100 per barrel on Friday after reported attacks on tankers in the Strait of Hormuz, extending the energy shock that drove the oil-driven bear flattener in July. This week the curve responded differently, with long yields falling, suggesting the market increasingly reads higher oil as a drag on growth as well as an inflation risk.
Federal Reserve Policy Outlook After the September 2026 CPI
The FOMC raised the federal funds target range 25bp to 3.75%-4.00% in September, as covered in our September 20 report on the Fed rate decision. This week's data reinforced the case for further tightening by year-end without forcing an October move. CME FedWatch odds of an October hike rose from 22% to 50% after the CPI release, then eased to 28% by Thursday afternoon.
Chair Warsh, speaking Friday at the IMF and World Bank Annual Meetings in Bangkok, said the Fed had made clear it would deliver price stability but added, "I don't prejudge meetings." Markets read the absence of a hawkish signal as support for an October hold, and Bloomberg reported that his remarks boosted expectations of a pause. The Beige Book, released Wednesday, described activity as little changed in most districts and cited higher fuel costs widely. The FOMC entered its pre-meeting blackout on October 17 ahead of the October 27-28 meeting, leaving the data and market conditions to set expectations until the decision.
Week Ahead: Housing Data and the Fed Blackout
- NAHB Housing Market Index (October 19): Builder sentiment for October, with consensus at 31 after a reading of 32 in September. Mortgage rates near multi-year highs make this an early read on how higher long-end yields are affecting housing.
- Housing Starts and Building Permits (October 20): September starts are expected at 1.30 million after 1.275 million in August. Permits will indicate whether builders are scaling back pipelines.
- Initial Jobless Claims (October 22): Consensus is 200,000 after 199,000. A move above 200,000 would end a five-week run below that level.
- University of Michigan Sentiment, Final October (October 23): The preliminary reading was 46.3, with one-year inflation expectations at 4.7% and five-year expectations at 3.5%. Any upward revision to expectations after the CPI and PPI reports would matter for the December debate.
- Fed Blackout and Credit Supply: No Fed communications are scheduled before the October 27-28 FOMC meeting. Investment grade issuance is expected to slow, and AI-infrastructure credit pricing will be the main test of high yield sentiment.
US Economic Positioning and Global Context
US yields declined alongside German and Japanese yields this week, a reminder that global duration demand still anchors the long end even as US inflation runs above peers. The dollar index edged lower on the week, and the yen remained near 158 per dollar, close to levels that have previously prompted intervention concern. Warsh described a synchronous tightening by central banks globally, and policy meetings at the ECB (October 29) and the Bank of Japan (October 30) follow the FOMC. For US fixed income, the key structural question is whether energy-driven inflation keeps term premium elevated or whether slower growth and risk-off demand pull long yields lower. This week's bull flattener favored the second outcome, but with 10-year and 30-year yields still at the 99th percentile of their five-year ranges, that conclusion depends on the path of oil and the Fed's December decision.
Key Articles of the Week
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Consumer Price Index News Release – September 2026U.S. Bureau of Labor StatisticsOctober 14, 2026Read Article
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Consumer Prices Rose 3.7% Annually in September as Gas Prices SkyrocketCNBCOctober 14, 2026Read Article
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Beige Book – October 2026Federal Reserve BoardOctober 14, 2026Read Article
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Wholesale Inflation Hits Levels Not Seen Since 2022PBS News (The Associated Press)October 15, 2026Read Article
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CoreWeave Credit Default Swaps Hit Distress Levels as Investors Sour on AI DebtCNBCOctober 15, 2026Read Article
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Bank Earnings Takeaways: How JPMorgan, Goldman, Wells Fargo and Citi Performed in Q3CNBCOctober 13, 2026Read Article
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Warsh Signals Steady Fed Outlook Despite Inflation JumpAxiosOctober 16, 2026Read Article
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Fed Chair Warsh Says Price Stability Is Key but Shies Away From Signals About RatesPBS News (The Associated Press)October 16, 2026Read Article
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Prior Report: September 2026 Jobs Report: 29K Payrolls, 10-Year Yield at 5.27%Mariemont Capital – Duration & Credit PulseOctober 5, 2026Read Article
Frequently Asked Questions
What did the September 2026 CPI report show?
Headline CPI rose 0.6% in September and 3.7% year over year, up from 3.4% in August, as the gasoline index rose 9.1% for the month. Core CPI rose 0.3% and 2.6% year over year, each a tenth above consensus. Energy drove the headline acceleration, while core inflation remained comparatively contained.
Why did Treasury yields fall after a hot September 2026 CPI report?
Fed officials had already signaled that a further hike need not come at the October meeting, so the data shifted expectations toward December rather than October. At the same time, a selloff in AI and semiconductor stocks drew flows into Treasuries. The 10-year yield reached 5.33% intraday after CPI but closed the week 17bp lower at 5.08%.
How did credit spreads react to the AI debt selloff?
High yield OAS widened 31bp to 331bp, matching its widest level of 2026, as CoreWeave credit default swaps rose above 1,000bp. Investment grade spreads widened only 3bp to 81bp after briefly reaching 88bp on Wednesday. Stress concentrated in lower-rated and AI-infrastructure debt rather than in high-grade corporates.
What are the odds of a Fed rate hike in October 2026?
CME FedWatch odds of an October hike rose from 22% to 50% after the CPI release, then eased to 28% by Thursday afternoon. Expectations for a hold rose further after Chair Warsh declined to signal his intentions on Friday. The FOMC meets October 27-28, and the pre-meeting blackout period began October 17.
